Hard Drive swap issue with HKEY_LOCAL_MACHINE

Taking hard drive from old pc to new pc. I am trying to delete the HKEY_LOCAL_MACHINE\Enum so that it will re-enter the hardware. Even if i am admin on local machine it will not let me delete Enum. There are multiple Control Set's (i.e. Control Set 001,Control Set 002, Control Set). I am only able to delete the Enum in the Current settings not in the LOCAL_MACHINE.

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